Abstract:
A power source apparatus is disclosed in this invention, specifically a power source apparatus comprising a voltage amplitude control unit that employs an active power factor corrector to control the output DC voltage by applying positive or negative logic control voltage, incorporated with high frequency power source circuit and high frequency transformer, brightness of Cold Cathode Fluorescent Lamp (CCFL) or External Electrode Fluorescent Lamp (EEFL) are controllable and DC power is directly applied to DC load. Such method is accomplished by adjusting the amplitude of the supplying DC voltage for controlling the amplitude of the high frequency voltage of CCFL or EEFL, thus called Voltage Amplitude Method. Because of the characteristics of stable frequency, high resolution and linearity, VAM is broadly used in the control of luminance of discharge tubes, such as TFT-LCD TVs, LCD monitors and advertisement lamps. The impulse width controller of the present invention achieves the luminance control of CCFL or EEFL inside or outside the glow discharge zone.
Abstract:
A multi-stage DC/AC coupled impact force enhancing device of an electric nailer includes an AC power source, a half-wave rectifying circuit, a doubler rectifying filter circuit, a DC steady-state circuit, an AC phase sampling circuit, a phase start circuit, a switch start circuit, an impulse oscillation circuit, a decoding counting circuit, an energy-storage circuit, a solid-state switch circuit, and an electromagnetic coil. Thus, the multi-stage DC/AC coupled impact force enhancing device can couple the alternating/direct current voltage to serially discharge the voltage to the electromagnetic coil of the electric nailer in a short period of time, thereby generating a larger impact force.
Abstract:
A multi-stage impact force enhancing device of an electric nailer includes an AC power source, an AC input control circuit, a tripler rectifying filter circuit, a DC steady-state circuit, a timing switch circuit, a decoding counting circuit, an impulse oscillation circuit, multiple energy-storage circuits, multiple solid-state switch circuits, and an electromagnetic coil. Thus, the multi-stage impact force enhancing device can serially discharge a voltage to the electromagnetic coil of electric nailer in a short period of time, thereby generating a larger impact force.
Abstract:
A new fluorescent device including an electronic fluorescent starter, a phase leading capacitor, a ballast, a bridge rectifier, a fluorescent lamp, a brightness compensation circuit, and a control circuit, the electronic fluorescent starter consisting of a master switch circuit, an ignition circuit and a time control circuit, wherein the electronic fluorescent starter matches with the ballast to turn on the fluorescent lamp; the control circuit turns the electronic fluorescent starter to the open circuit state when the fluorescent lamp is turned on; the brightness compensation circuit improves the intensity of light from the fluorescent lamp.
Abstract:
A microcontroller for providing remote control of electrical switches and comprising a control unit and a switch unit. The control unit comprises a telephone interface, a keyboard, a central processing unit and a character pattern interface. The switch unit comprises a data decoder, a central processing unit and a plurality of solid state relays, wherein the solid state relays are controlled to selectively connect power to loads or disconnect power therefrom, in response to commands sent from the keyboard directly, or through a telephone or radio telephone or a computer network from the keyboard.
Abstract:
A new double solid state relay comprising two sets of solid state relays and being constructed in such a way that it can turn on and off a circuit with a voltage very close to zero. It is the only solid type double solid state relay in the world and is safe enough for popular use in the industry.